User s Guide DRST-CM. Communication Enabler. Shop online at omega.com. For latest product manuals:

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1 TM User s Guide Shop online at omega.com info@omega.com For latest product manuals: Communication Enabler

2 U.S.A. Headquarters: omega.com Servicing North America: Omega Engineering, Inc. Toll-Free: (USA & Canada only) Customer Service: (USA & Canada only) Engineering Service: (USA & Canada only) Tel: (203) Fax: (203) For Other Locations Visit omega.com/worldwide The information contained in this document is believed to be correct, but OMEGA accepts no liability for any errors it contains, and reserves the right to alter specifications without notice.

3 Table of Contents Transmitter Table of Contents Section... Page Section 1 Warning... 5 Section 2 Symbol Identification... 5 Section 3 Safety Instructions... 6 Section 4 Applications... 7 Section 5 Technical Characteristics... 7 Section 6 Mounting/ Installation/ Programming... 8 Section 7 Mounting on a DRST device... 8 Section 8 Order...8 Section 9 Electrical Specifications Section 10 Modbus Parameter settings Section 11 Modbus Settings - Routing Diagram

4 1 Warning GENERAL WARNING This device is designed for connection to hazardous electric voltages. Ignoring this warning can result in severe personal injury or mechanical damage. To avoid the risk of electric shock and fire, the safety instructions of this guide must be observed and the guidelines followed. The specifications must not be exceeded, and the device must only be applied as described in the following. Prior to the commissioning of the device, this installation guide must be examined carefully. Only qualified personnel (technicians) should install this device. If the equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may be impaired. HAZARDOUS VOLTAGE WARNING Until the device is fixed, do not connect hazardous voltages to the device. The following operations should only be carried out on a disconnected device and under ESD safe conditions: General mounting, connection and disconnection of Modbus cable. Troubleshooting the device. WARNING Repair of the device must be done by Omega A/S only. CAUTION Section Symbol Identification Triangle with an exclamation mark: Read the manual before installation and commissioning of the device in order to avoid incidents that could lead to personal injury or mechanical damage. The CE mark proves the compliance of the device with the essential requirements of the directives. The double insulation symbol shows that the device is protected by double or reinforced insulation. 4

5 2 Safety Instructions Section 2 - Safety instructions Receipt and unpacking Unpack the device without damaging it and check whether the device type corresponds to the one ordered. The packing should always follow the device until this has been permanently mounted. Environment The device is manufactured for indoor use. Avoid direct sunlight, dust, high temperatures, mechanical vibrations and shock, as well as rain and heavy moisture. If necessary, heating in excess of the stated limits for ambient temperatures should be avoided by way of ventilation. The device may be used in Overvoltage Category II, Pollution Degree 2 at an altitude up to 2000 m. Mounting Only qualified technicians who are familiar with the technical terms, warnings, and instructions in this installation guide and who are able to follow these should connect the device. Only devices which are undamaged and free of moist and dust may be installed. The device may be installed and supplied by Omega DRST series only. Should there be any doubt as to the correct handling of the device, please contact your local distributor or, alternatively, Calibration and Adjustment During calibration and adjustment, the measuring and connection of external voltages must be carried out according to the specifications of this manual. The technician must use tools and instruments that are safe to use. Cleaning When disconnected, the device may be cleaned with a cloth moistened with distilled water. IECEx, ATEX installation in Zone 2 IECEx DEK X... Ex na IIC T5 Gc DEKRA 13ATEX0098 X... II 3 G Ex na IIC T5 Gc For safe installation the following must be observed The device must be installed by qualified personnel who are familiar with the national and international laws, directives and standards that apply to this area. Year of manufacture can be taken from the first two digits in the serial number. The devices must be installed in a suitable enclosure providing a degree of protection of at least IP54 according to EN60529, taking into account the environmental conditions under which the equipment will be used. To prevent ignition of the explosive atmospheres do not separate connectors when energized and an explosive gas mixture is present. To avoid the risk of explosion due to electrostatic charging of the enclosure, do not handle the units unless the area is known to be safe, or appropriate safety measures are taken to avoid electrostatic discharge. Liability To the extent the instructions in this manual are not strictly observed, the customer cannot advance a demand against Omega A/S that would otherwise exist according to the concluded sales agreement. 5

6 How to demount System DRST 3 Section 3 - Communication Enabler Programming display for system DRST devices Modbus RTU protocol interface over RS485 Monitor process value from the built-in display High 2.5 kv isolation to host unit Shielded RJ45 Modbus connector on top Section 4 - Applications The detachable display adds Modbus RTU RS-485 serial communications to all current and future DRST units. The unit converts a wide array of sensors and analog device signals measured by the system DRST, like uni- and bipolar ma and voltage signals, potentiometer, Lin. R, RTD and TC, to a Modbus communication line signal. When mounted on a system DRST device any signal coming from or going to I.S. classified area, like AI, AO, DI and DO signals, can be converted to a Modbus network. All individual unit operating parameters can easily and quickly be configured by using the Modbus communication or by using the front display menu. The easily readable display can be used to read the process signal, simulate the output signal, indicate sensor errors and internal module errors. Section 5 - Technical Characteristics has full DRSL-DISPLAY functionality for unit programming, process signal monitoring and diagnostics handling. Modbus RTU protocol is supported using a serial RS-485 communication wiring. Multidrop half-duplex connection via shielded RJ45 connector. High safe galvanic isolation of 2.5 kvac between the serial wiring and the connected system DRST units. Modbus parameters such as address, baud rate, stop bit(s), and parity bit are configured from the display, which also stores parameters. Section 6 - Mounting / Installation / Programming Mounting in Zone 2 / Div 2. The can be moved from one device to another. The individual system DRST unit configuration of the first transmitter can be saved and downloaded to subsequent transmitters. Programmed parameters can be protected by a user-defined password. When mounted on devices that are installed upside down, a menu item allows the display on the to be rotated 180o and the up/down buttons to switch function. 6

7 7 Mounting on a DRST device Section Mounting on a DRST device is a detachable display that can be mounted on all DRST fronts for programming and signal monitoring. contains a four line LCD dot display Line 1 can e.g. show the scaled process value. Line 2 can e.g. show the selected engineering unit. Line 3 can e.g. show the analog output or TAG no. Line 4 shows status for communication and e.g. signal trending. RJ45 Modbus Connector Pin 5: RS485 A line Pin 4: RS485 B line Pin 8: RS485 GND and shield Section 8 - Order Type DRSL-DISPLAY Description Communication enabler Configmate interface 7

8 Electrical Specification 9 Section 9 - Electrical specifications Environmental conditions: Specifications range C to +60 C Storage temperature C to +85 C Humidity < 95% RH (non-cond.) Protection degree IP20 Installation in pollution degree 2/overvoltage category II. Mechanical specifications: Dimensions (H x W x D) x 23.3 x 26.5 mm Dimensions (H x W x D) w/drst unit x 23.5 x 131 mm Weight approx g Connection RJ45 - shielded Common specifications: Power consumption W Isolation voltage - test/working kvac / 250 VAC reinforced isolation Extended EMC immunity: NAMUR NE 21, A criterion, burst No loss of communication Signal/noise ratio > 60 db Update rate/response time > 50 Hz / < 20 ms Signal type RS-485 half duplex Serial protocol Modbus RTU Modbus mode RTU - slave Devices on an RS485 line Up to 32 (without a repeater) Data rates, baud , 4800, 9600, 19200, 38400, 57600, Automatic baudrate detection Yes - can be configured ON or OFF Parity Even, Odd, None Stop bit(s) or 2 Digital adressing Response delay ms Approvals: EMC 2004/108/EC EN LVD 2006/95/EC EN UL, Standard for Safety UL Marine: Det Norske Veritas, Ships & Offshore Standard for Certification No. 2.4 Ex: ATEX DEKRA 13ATEX0098 X II 3 G Ex na IIC T5 Gc IECEx DEK X Ex na IIC T5 Gc FM C CL I DIV2 GP A- D T5 CL I Zn2 Groups IIC T5 CL I Zn2 AEx/Ex na IIC T5 8

9 9 Electrical Specification Section 9 - Electrical Specification Modbus RTU T PLC/DCS HMI/PC DRST DRST DRST Safe Area Modbus RTU Gateway Zone 2 / Cl. 1, Div. 2, gr. A-D Modbus RTU T PLC/DCS HMI/PC DRST DRST DRST IP54 Gateway Access Point Ethernet DRST- DISPLAY Modbus RTU T PLC/DCS HMI/PC Modbus TCP/IP DRST DRST DRST 9

10 Modbus Basics 10 Section 10 - Modbus Basics Modbus is a master-slave system..., where the master communicates with one or multiple slaves. The master typically is a PLC (Programmable Logic Controller), DCS (Distributed Control System), HMI (Human Machine Interface), RTU (Remote Terminal Unit) or PC. The three most common Modbus versions used are: MODBUS ASCII, MODBUS RTU and MODBUS/TCP. In Modbus RTU, data is coded in binary, and requires only one communication byte per data byte. This is ideal for use over multi-drop RS485 networks, at speeds up to 115,200 bps. The most common speeds are 9,600 bps and 19,200 bps. Modbus RTU is the most widely used industrial protocol and is supported by the. Modbus RTU: To communicate with a slave device, the master sends a message containing: Device Address - Function Code - Data - Error Check The Device Address is a number from 0 to 247. Messages sent to address 0 (broadcast messages) will be accepted by all slaves, but numbers are addresses of specific devices. With the exception of broadcast messages, a slave device always responds to a Modbus message so the master knows the message was received. Command Function code Read Holding Registers 03 Read Input Registers 04 Write Single Register 06 Diagnostics 08 Write Multiple Registers 16 Supported Modbus Function Codes: The Function Code defines the command that the slave device is to execute, such as read data, accept data, report status. Some function codes have subfunction codes. The Data defines addresses in the device s memory map for read functions, contains data values to be written into the device s memory, or contains other information needed to carry out the function requested. The Error Check is a 16-bit numeric value representing the Cyclic Redundancy Check (CRC). Maximum number of registers which can be read or written at once: For a read command, the limit is 8 registers at a baud rate up to 38,400 bps, 16 57,800 bps and ,200 bps. For a write command, the limit is 123 registers at baud rates up to 115,200 bps. 10

11 10 Modbus Parameter settings Modbus parameter settings Automatic Baudrate Detection: Can be configured YES or NO Supported baudrates: 2400, 4800, 9600, 19.2k, 38.4k, 57.6k, 115.2k bps Parity Mode: Even, Odd or None parity Stop Bits: 1 or 2 stop bits Response delay: ms (0 ms = default) Modbus slave addressing range: (247 = default address) Modbus Parameter Storage: Saved in non-volatile memory in the device (Factory Default Values are marked in bold) Modbus RTU segment line termination: A 120 Ohm resistor should be installed on both ends of a RS485 Modbus RTU segment loop to prevent signal echoes from corrupting data on the line. 11

12 Modbus Settings - Routing diagram 11 Modbus settings - Routing Diagram local subm V0R9 SCROLLING HELPTEXTS: "Monitor" [1] Set correct passwordscrolli (correct) No (No) xxxx [2] Enter advanced setup menu? [1] % ---OK--> > PASSW. ---OK--> ADV.SET ---OK--> XXXX [3] Enter Language setup [2] Enter Password setup 10.4mA [1] [2] (Yes) [x] [3] ^ o V v ^ v ^ v ^ 9999 YES 0000 NO MEM (MEM) ----> SETUP -OK---> Disable Modbus communication [3] [4] See automatic baudrate detection status (DISP) [5] Reset Modbus to default? v ^ --> [6] Select Modbus slave address MEM [7] Select parity for Modbus[5] DISP (CAL) [8] Select number of stop bits [6] CAL --> [9] Select response delay in [7] ms SIM [10] Enable automatic baudrate [8] detection PASS (SIM) [11] Modbus baudrate not detected [9] LANG --> Searching for Modbus baudrate [10] MODB Modbus baudrate detected [11] [12] Select baudrate in bps ORIEN (PASS) [13] Rotate device upside down? --> [12] (LANG) [13] --> (MODB) YES (OFF) --> > MOD.EN ---OK--> [4] (ON) NO (Yes) v ^ ----> MOD.RST ---OK-->!!! Returns to "Monitor" from any menu, after 1 min with no keypress. ON [5] (No)!!! Returns to "Monitor" upon succesful Modbus write command. OFF STATUS *1) v ^ ----> YES NO The gray shaded menus/texts are only shown for guidance, and are not part of the specific submenu. The Modbus submenu is located somewhere in the menu structure of any host device supporting. The actual place is definedfor each particular device. (STATUS) *1) ----> Only if automatic baudrate detection is enabled (ORIEN) NO --> ROT.DEV ---OK--> "Monitor" [13] v ^ YES NO Enter Simulation mode Perform Process calibration Enter Display setup Perform Memory operations Enter Modbus setup Enter Rotation setup [4] Enable modbus communication Omega A/S Local Menu 12

13 11 Modbus settings- Routing Diagram Modbus settings - Routing Diagram cont. [3] (DISP) v ^ --> MEM DISP (CAL) CAL --> SIM PASS (SIM) LANG --> MODB ORIEN (PASS) --> (LANG) --> (MODB) YES (OFF) --> > MOD.EN ---OK--> [4] (ON) v ^ ---->!!! Returns to "Monitor" from any menu, after 1 min with no keypress. ON!!! Returns to "Monitor" upon succesful Modbus write command. OFF STATUS *1) MEM (MEM) ----> SETUP -OK---> 9999 YES 0000 NO v ^ v ^ v ^ Default settings: Baud rate: Parity mode: Stop bit: Address: Reponse delay: 19.2 kbps Even "Monitor" (correct) No (No) xxxx % ---OK--> > PASSW. ---OK--> ADV.SET ---OK--> XXXX 10.4mA [1] [2] (Yes) [x] ^ o V 0 ms 13

14 WARRANTY/DISCLAIMER OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship for a period of 13 months from date of purchase. OMEGA s WARRANTY adds an additional one (1) month grace period to the normal one (1) year product warranty to cover handling and shipping time. This ensures that OMEGA s customers receive maximum coverage on each product. If the unit malfunctions, it must be returned to the factory for evaluation. OMEGA s Customer Service Department will issue an Authorized Return (AR) number immediately upon phone or written request. Upon examination by OMEGA, if the unit is found to be defective, it will be repaired or replaced at no charge. OMEGA s WARRANTY does not apply to defects resulting from any action of the purchaser, including but not limited to mishandling, improper interfacing, operation outside of design limits, improper repair, or unauthorized modification. This WARRANTY is VOID if the unit shows evidence of having been tampered with or shows evidence of having been damaged as a result of excessive corrosion; or current, heat, moisture or vibration; improper specification; misapplication; misuse or other operating conditions outside of OMEGA s control. Components in which wear is not warranted, include but are not limited to contact points, fuses, and triacs. OMEGA is pleased to offer suggestions on the use of its various products. However, OMEGA neither assumes responsibility for any omissions or errors nor assumes liability for any damages that result from the use of its products in accordance with information provided by OMEGA, either verbal or written. OMEGA warrants only that the parts manufactured by the company will be as specified and free of defects. OMEGA MAKES NO OTHER WARRANTIES OR REPRESENTATIONS OF ANY KIND WHATSOEVER, EXPRESSED OR IMPLIED, EXCEPT THAT OF TITLE, AND ALL IMPLIED WARRANTIES INCLUDING ANY WARRANTY OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. LIMITATION OF LIABILITY: The remedies of purchaser set forth herein are exclusive, and the total liability of OMEGA with respect to this order, whether based on contract, warranty, negligence, indemnification, strict liability or otherwise, shall not exceed the purchase price of the component upon which liability is based. In no event shall OMEGA be liable for consequential, incidental or special damages. CONDITIONS: Equipment sold by OMEGA is not intended to be used, nor shall it be used: (1) as a Basic Component under 10 CFR 21 (NRC), used in or with any nuclear installation or activity; or (2) in medical applications or used on humans. Should any Product(s) be used in or with any nuclear installation or activity, medical application, used on humans, or misused in any way, OMEGA assumes no responsibility as set forth in our basic WARRANTY/DISCLAIMER language, and, additionally, purchaser will indemnify OMEGA and hold OMEGA harmless from any liability or damage whatsoever arising out of the use of the Product(s) in such a manner. RETURN REQUESTS/INQUIRIES Direct all warranty and repair requests/inquiries to the OMEGA Customer Service Department. BEFORE RETURNING ANY PRODUCT(S) TO OMEGA, PURCHASER MUST OBTAIN AN AUTHORIZED RETURN (AR) NUMBER FROM OMEGA S CUSTOMER SERVICE DEPARTMENT (IN ORDER TO AVOID PROCESSING DELAYS). The assigned AR number should then be marked on the outside of the return package and on any correspondence. The purchaser is responsible for shipping charges, freight, insurance and proper packaging to prevent breakage in transit. FOR WARRANTY RETURNS, please have the following information available BEFORE contacting OMEGA: 1. Purchase Order number under which the product was PURCHASED, 2. Model and serial number of the product under warranty, and 3. Repair instructions and/or specific problems relative to the product. FOR NON-WARRANTY REPAIRS, consult OMEGA for current repair charges. Have the following information available BEFORE contacting OMEGA: 1. Purchase Order number to cover the COST of the repair, 2. Model and serial number of the product, and 3. Repair instructions and/or specific problems relative to the product. OMEGA s policy is to make running changes, not model changes, whenever an improvement is possible. This affords our customers the latest in technology and engineering. OMEGA is a trademark of OMEGA ENGINEERING, INC. Copyright 2018 OMEGA ENGINEERING, INC. All rights reserved. This document may not be copied, photocopied, reproduced, translated, or reduced to any electronic medium or machine-readable form, in whole or in part, without the prior written consent of OMEGA ENGINEERING, INC.

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